Q: Does "exercise" have the same meaning in the following two sentences?

Some parents exercise their infants.

This puzzle will exercise your mind.

OPTIONS:
- different meanings
- the same meaning

A: the same meaning


Q: Does "sign" have the same meaning in the following two sentences?

Charges of opposite sign.

He posted signs in all the shop windows.

OPTIONS:
- different meanings
- the same meaning

A: different meanings


Q: Does "third" have the same meaning in the following two sentences?

He ate a third of the pie.

A simple harmony written in major thirds.

OPTIONS:
- different meanings
- the same meaning

A:
the same meaning